LOMM.h

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/*
 * LOMM.h
 *
 * Copyright (c) 2023 Lost Robot <r94231/at/gmail/dot/com>
 *
 * This file is part of LMMS - https://lmms.io
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program (see COPYING); if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301 USA.
 *
 */
 
 
#ifndef LMMS_LOMM_H
#define LMMS_LOMM_H
 
#include "LOMMControls.h"
#include "Effect.h"
 
#include "BasicFilters.h"
 
namespace lmms
{
 
constexpr inline float LOMM_MIN_FLOOR = 0.00012589f;// -72 dBFS
constexpr inline float LOMM_MAX_LOOKAHEAD = 20.f;
constexpr inline float LOMM_AUTO_TIME_ADJUST = 5.f;
 
class LOMMEffect : public Effect
{
        Q_OBJECT
public:
        LOMMEffect(Model* parent, const Descriptor::SubPluginFeatures::Key* key);
        ~LOMMEffect() override = default;
 
        ProcessStatus processImpl(SampleFrame* buf, const f_cnt_t frames) override;
 
        EffectControls* controls() override
        {
                return &m_lommControls;
        }
        
        inline float msToCoeff(float ms)
        {
                return (ms == 0) ? 0 : std::exp(m_coeffPrecalc / ms);
        }
 
private slots:
        void changeSampleRate();
 
private:
        LOMMControls m_lommControls;
        
        float m_sampleRate;
        
        StereoLinkwitzRiley m_lp1;
        StereoLinkwitzRiley m_lp2;
        
        StereoLinkwitzRiley m_hp1;
        StereoLinkwitzRiley m_hp2;
        
        BasicFilters<2> m_ap;
        
        bool m_needsUpdate;
        float m_coeffPrecalc;
        
        std::array<std::array<float, 2>, 3> m_yL;
        std::array<std::array<float, 2>, 3> m_rms;
        std::array<std::array<float, 2>, 3> m_gainResult;
        
        std::array<std::array<float, 2>, 3> m_displayIn;
        std::array<std::array<float, 2>, 3> m_displayOut;
        
        std::array<float, 2> m_crestPeakVal;
        std::array<float, 2> m_crestRmsVal;
        std::array<float, 2> m_crestFactorVal;
        float m_crestTimeConst = 0.0f;
        
        std::array<std::array<float, 2>, 3> m_prevOut;
        
        std::array<std::array<std::vector<float>, 2>, 3> m_inLookBuf;
        std::array<std::array<std::vector<float>, 2>, 3> m_scLookBuf;
        
        int m_lookWrite = 0;
        int m_lookBufLength = 0;
        
        friend class LOMMControls;
        friend class gui::LOMMControlDialog;
};
 
 
} // namespace lmms
 
#endif // LMMS_LOMM_H